葛藤节肢动物类群结构动态

本文利用群落结构的有关指数(物种数S、丰富度指数R、多样性指数H、H'、D和DMc、均匀性指数J'、优势度指数d和优势集中性指数C)分析了葛藤节肢动物类群结构变化动态.结果表明,葛藤节肢动物类群丰富度和多样性一年中出现两个高峰,一个在五月下旬,一个在十一月上中旬,在第一个峰期,S,R,D,H',H和DMc的值依次为38.00,6.0205,0.9056,4.0205,3.8560和0.7207,在第二个峰期,上述指数依次为34.00,6.6661,0.9245,4.2124,3.6779和0.7808;均匀性在一至四月变化较剧烈,最大值0.8899出现在1月中旬,最小值0.5765出现在二月下旬,其它时间较为平稳;优势集中性和优势度指数的变化趋势一致,其高峰值出现在二月下旬至三月上旬.分析表明,多样性和优势集中性变化趋势往往相反,即物种越丰富,多样性越大,相应的优势集中性就越小,反之就大;均匀性与多样性关系密切,即群落多样性较高时均匀度变化较为平稳,反之,就剧烈.

Structure of Arthropod group in Kudzu (Pueraria lobata Ohwi)

In this paper, dynamics of structure of Arthropod groups in Kudzu Pueraria lobata was analyzed based on parameters of richness the number of species (S), richness of species (R)], diversity Shannon-Wiener index (H'), Brillouin index (H), Simposon index (D), and Mclntosh index (DMc)], evenness (J'), dominance dominance degree (d) and dominance concentration degree (C)J. Two peaks of the richness and diversity occurred in a year, one in late May and the second in November. During the period of first peak, indexes of 5, R , D, H', H and DMc were 38.00, 6.020 5, 0.905 6,4.020 5, 3.856 0 and 0.720 7, respectively. In the second peak period, the values above parameters were 34.00, 6.666 1, 0.924 5,4.212 4, 3.677 9 and 0.780 8 respectively. The index J' fluctuated significantly from January to April, with maximum (0.889 9) in middle January and minimum (0.576 5) in late February. The same trend of d comparing with C was found and its peak occurred in late February to early March. It showed that there was an opposite trend between diversity and dominance and that a consanguineous relation between evenness and stability was found.